Ok, got it.
(in the form of BitUSD but Notes are what the collateral is on the back end)
This means you have your own BitAssets on your BitShares Music blockchain?
Good for you!
I still have no clue what those Music bitUSD are?
or How are they backed by the notes?
Look at it this way.
BitUSD is not really a "thing" or a coin, it's 1 USD worth of BTSX. So when you are trading around a BitUSD, you are actually trading around 1 US dollar's worth of purchasing power of crypto... something. On the BitSharesX platform, 1 BitUSD is 1 US dollar's worth of BTSX.
On the BitShares Music Blockchain, the unit is the Note. So if you want to trade 1 BitUSD, you are really trading 1 US dollar's worth of Notes. Which takes the form of a BitUSD.
They both look like a digital US dollar, only if you open it up, one is collateralized by BTSX then other is collateralized by Notes.
I could get a loan at a bank, for 10k USD. They might ask for collateral. I could offer up my Honda Civic.
My friend could go to the bank and also ask for a 10k USD loan. He could offer up his VW Jetta as collateral. We both would have a 10 000 USD loan, but his is back a one type of car, mine is backed by another.
Not the best analogy but I hope it helps haha.
Also yes, Cross chain trading will be an eventual feature in the bitshares space. Bytemaster said so in another thread.